Sand papering-machine



(No Model.) 2 Sheets-Sheet 1.

H. N. RANGE. SANDPAPBRING MACHINE.

No. 522,918. Patented July 10, 1894.

IIIPIIR gill UNITED STATES PATENT OFFICE.

HERGULE N. RANGE, OF CHICAGO, ILLINOIS SANDPAPERING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 522,918, dated July 10, 1894.

Application filed March 30,l 894:. Serial No. 505,755. (No model.)

. To aZZ whom it may concern:

ence being had therein to the accompanying drawings, in which- Figure l is a front elevation of my machine; Fig. 2 an end elevation; Fig. 3 a plan view; Fig. 4 a vertical sectional view on the line 4.4= of Fig. 3; Fig. 5 a detail sectional view showing the adjustable supplemental Wheel out of use, and Fig. 6 a detail view of the sand-paper wheel showing the devices for securing and tightening the sandpaper.

This invention has relation to machines for sandpapering the reduced edges of panels, and it consists in certain features of construction and arrangement hereinafter fully described and claimed.

In the drawings, a designates the frame of the machine, I) the table thereof, 0 the main shaft carrying the main sandpaper wheel 01 at one end, said wheel working up through an opening formed in the front edge of the table. The sandpaper is secured on the periphery of this wheel, and interposed between the Wheel and the sandpaper is the usual felt cushion. One edge of the sandpaper projects outwardly a suitable distance beyond the outer edge of the wheel, forming an annular flexible or yieldable part (1 which is adapted to work against the beveled shoulders of the panel, as shown most clearly in Fig. 4.

The sandpaper may be stretched upon the wheel by any suitable means, but I prefer the devices shown in Fig. 6. In this construction a plate 6 is employed, this plate being pivoted at one end in a recess in the wheel d and being provided at its other end with an angular lip e which projects outwardly toward the periphery of the wheel.

Pivoted in the same recess with plate 6 and on the same pivot therewith is a clamping plate e", whose free edge extends to near the angular lip of the main plate a. These two plates are drawn together by a rod or pin e which passes through the plates radially and has a head formed on its outer end and a set screw e tapped on its inner end, said setscrew bearing against a suitable part or stop 6 of the wheel.

Surrounding the pin (2 between the two plates is a coil spring 6, and on the pin between the main plate c and the stop 6 is another coil-spring e which is stronger than said spring a. The two edges or ends of the strip of sandpaper after being passed around the wheel are inserted in the transverse slot in its periphery and in between the lip c and the free end of the plate 0. The thumb screw is then turned to draw the pin radially inward, whereupon spring c will first yield and plate c will clamp the two ends of the sandpaper against lip e, and then by continuing to draw the pin radially inward the stronger spring 6 will yield and permit both plates to be swung inwardly together, thereby permitting any desired tension to be given to the sandpaper.

J ournaled upon a short axle f is a supplemental-wheel f, which is supported adjacent to the outer face of the wheel d and is smaller in diameter than said wheel. The periphery of this wheel is suitably beveled to fit the beveled shoulders of the panel, and the wheel is mounted on the inner end of the axle f in order that it may come close to the face of the main wheel. This wheel is rotated at the same speed as the main wheel by means of a pulley f secured to its outer side and driven by a belt f this belt passing over a pulley f 3 carried by a counter shaft f journaled in the lower part of the machine, this countershaft being driven by a belt f running over suitable pulleys on said counter shaft and main shaft.

The axle f is supported in a bar g, which is pivotally supported at its ends in the outer ends of bars g extending out from the frame of the machine. The bar g is rotatably adjustable fuponits pivots and is held rigidly in its adjusted positions by means of a plate g secured on one of its ends, said plate extending inwardly adjacent to the inner side of one of the arms 9 and provided with a segmental slot g near its inner edge. This plate 9" is adjustably clamped to the bar g by means of a set screw g which is carried bysaid arm g and Works in the slot 9 The inner ends of bars 9' are pivotally and adj ustably clamped to the frame by means of set screws it carried by the frame and working through longitudinal slots h in said bars 9. The frame formed by the bars g and g is adjustably supported by means of stops it" adjustably clamped to the uprights of the machine-frame.

It will be observed that the periphery of wheel f may be adjusted so as to bear upon the inner side of the yielding edge (1 .of the sandpaper, thereby keeping the flexible part of the sandpaper pressed against the beveled shoulder of the panel. Making the bar 9 adjustable rotatively permits the axle f to be set at the proper angle to suit the bevel of the shoulder of the panel, and making the frame carrying said axle vertically adjustable permits the wheel to be thrown out of use by dropping it down, as shown in Fig. 5.

It will be observed that the periphery of the wheel f may be convexed or concaved or otherwise formed whenever it is desired to dress off shoulders having other contours. The object of this supplemental wheel is to keep the sandpaper pressed positively against the shoulder of the panel and insure the formation of sharp corners or angles and also avoid the formation of ridges in the work.

The panel is supported in passing over the sandpaper wheel by a cylindrical bar 1 which is supported in the outer ends of arms 1" by means of a rod is extending longitudinally through the bar or roller t and through the ends of arms 01. The rod 7c passes eccentrically through the roller 2' and has tapped on one end a thumb screw 7p, in order that the serve to guide the arms in their longitudinal adjustments. By thus eccentrically mounting the supporting roller or rod 2' and making it rotatably adjustable, it will be observed that the panel may be supported at the desired angle, and by making the arms 2" adjustable outwardly and inwardly, the supporting rod 'i may be set to accommodate wider and narrower panels.

A guide Z is mounted upon the table parallel with the main wheel d to assist in guiding the panel and also for regulating the width of the exposed surface of the sandpaperwheel. This guide Z has a rearwardly-extending arm Z which works in a transverse groove Z in the table and thereby serves to keep the guide parallel with the sandpaper wheel. The arm Z carries a set-screw m, which works through corresponding slots m in the table and said arm and thereby serves to clamp the guide Z in its adjusted positions. A pressureroller n is carried by said guide Z and is provided with an elastic tire n. This roller is journaled upon a short axle n which is adj ustably supported in a slotted standard n bolted to the guide I. The axle n" projects forwardly from the support n in order to bring the roller over the work. The elastic tire on the roller permits the roller to accommodate itself to the oblique surface of the .panel, and mounting the roller adjustably permits it to be raised and lowered to accommodate panels of varying thicknesses. This wheel keeps the work down close to the sandpaper wheel as the work passes through the machine.

To support the panel on opposite sides of themselves are made longitudinally adj ustable by means of a suitable slot and set screw 0. These strips support the panel as it passes under the pressure wheel and keep it approximately level, and by longitudinally adjustingv the strips on the table the amount of exposed wheel surface may be regulated to suit the character of work being performed.

It is evident that the specific construction of this machine may be varied without departing from the spirit of the invention.

As shown most clearly in Fig. 4, the guide l may be recessed at p in order to permit it to be adjusted over the surface of the sandpaper wheel and thereby regulate the width of the grinding surface exposed.

It is desirable that the strip of sandpaper be creased near one edge before it is secured around the wheel, in Order that the projecting edge may yield readily and conform to the bevel of the panel.

Having thus fully described my invention,

what I claim is 1. In a sandpapering machine, the combination of a table, a main sandpapering wheel, a strip of sandpaper secured thereon and having its annular edge extending beyond one face of the wheel, and a supplemental wheel supported adjacent to the main wheel and adapted to press the projecting edge of the sandpaper against the work, substantially as described.

2. The combination of a frame, a main wheel, sandpaper secured on the periphery of said wheel and projecting beyond one edge, a supplemental Wheel supported upon an independent axle adjacent to the main wheel, and

means for obliquely setting said supplemencry of the sandpaper wheel, and the strips paper secured on said wheel and projecting beyond its edge, avertically adjustable frame carrying an axle, a supplemental wheel carried by said axle and supported adjacent to the main wheel and adaptedto press the extended portion of the sandpaper against the work, and. means for rotating said supplemental wheel, substantially as described.

5. The combination of a main frame, a sandpapering wheel, a supporting roller set eccentrically and rotatably adjustable, and longitudinally adjustable arms supporting said roller, substantially as described.

6. The combination of a sandpapering wheel and means for securing and tightening the sandpaper thereon, said means consisting of a movable plate carrying a lip, another plate also movable and adapted to be pressed against said lip, a pin or bolt engaging said plates, a spring interposed between the plates, another spring interposed between thelipped plate and an adjacent stop, and means for adjusting the pin or bolt endwise, substantially as described.

7. The combination of a wheel carrying a strip of sandpaper, a plate e pivoted at one end and provided with a lip at its other end, another plate a" pivoted at one end and its other end being adapted to bear against the lip on plate e, a bolt or pin passing through said plates and being endwise adjustable, a spring interposed between the plates, and a stronger spring interposed between plate 6 and an adjacent stop, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

. HERCULE N. RANGE.-

Witnesses:

GEO; E. WILLIAMS, 0. W. DUNKLLEY. 

